The author claims that his treatment of the subject is different from other prominent scholar like E. W. Hopkins, G. T. Date, H. C. Roy, P. C. Chakraarty which his claim by periodically, empire bye empire with an eye to describing the military organizing in the political background. According to him a sound defence organization is often an aid to political expansion, and political expansion is a recurring phenomenon in ancient Indian history. The book is divided into ten chapters beginning to struggle for powers in the Vedic period of the breakdown of the Hindu military system. It is a handy and useful book mainly for students and teachers and scholars trying to trace the historic perspective of the military system in ancient India.